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Thread: VR Engine swap

  1. #1
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    Default VR Engine swap

    I have a VR with 3.8 Buick and 5spd manual, the engine is on its way out (spun big end) I want to swap engines with a ecotec 3.8 from a Vs - Vy
    Will the T5 from the Buick bolt up to the Ecotec. (edited as found out more about engine models)


    Any help much appreciated.
    Last edited by waynenz; 03-09-2020 at 08:12 PM.

  2. #2
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    Ecotech was still the 3.8 Buick so I would say yes. Also the T5 can bolt up to the 5.0 V8 which is what you should be doing.

  3. #3
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by RedTaxi View Post
    Ecotech was still the 3.8 Buick so I would say yes. Also the T5 can bolt up to the 5.0 V8 which is what you should be doing.
    You may as well as it won't be that much more work then to swap to an ecotec.

    To do the Ecotec properly you'd need a VS wiring harness & ECU as it's sequential and it has a MAF sensor where as the VR has MAP. Might be easier to put the VR top end on an Ecotec short motor?

  4. #4
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    Thanks, top end swap sounds like the best option for now, So heads bolt straight up without any modification. Just want it back on the road.

  5. #5
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    already have an HQ with LS1 in it, just want this going again and not another project.

  6. #6
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    Ok just read on any earlier post that ecotec have different deck height and inlet wont fit between heads. Is plenty of ecotecs around for cheap but not many S2 buicks in NZ

  7. #7
    casual poster Willie's Avatar
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    From memory - use VS wiring harness, ECU & BCM, use your VR exhaust manifolds, change or modify the thermostat housing for your current sender, you may have to swap the sump (you do on an auto, not sure on a manual) & remove the EGR stuff.

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    Quote Originally Posted by Willie View Post
    From memory - use VS wiring harness, ECU & BCM, use your VR exhaust manifolds, change or modify the thermostat housing for your current sender, you may have to swap the sump (you do on an auto, not sure on a manual) & remove the EGR stuff.
    Thanks, I picked up a Vs ecotec, harness and ECU today didnt get the bcm though, will my Vr bcm be ok to use. If I can get a bcm I'm guessing I need to get the matching key.

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